How to resolve systemd (code=exited, status=227/NO_NEW_PRIVILEGES)?

I am trying to install the GitLab community package on a Debian Stretch system, but one of its dependencies, redis-server, fails to install when starting the service using systemd. Complete log: ------------- $ sudo dpkg --configure redis-server Setting up redis-server (3:3.2.5-4) ... Job for redis-server.service failed because the control process exited with error code. See "systemctl status redis-server.service" and "journalctl -xe" for details. invoke-rc.d: initscript redis-server, action "start" failed. ● redis-server.service - Advanced key-value store Loaded: loaded (/lib/systemd/system/redis-server.service; enabled; vendor preset: enabled) Active: activating (auto-restart) (Result: exit-code) since Thu 2016-12-15 15:00:17 UTC; 31ms ago Docs: http://redis.io/documentation , man:redis-server(1) Process: 8764 ExecStart=/usr/bin/redis-server /etc/redis/redis.conf (code=exited, status=227/NO_NEW_PRIVILEGES) Process: 8761 ExecStartPre=/bin/run-parts --verbose /etc/redis/redis-server.pre-up.d (code=exited, status=227/NO_NEW_PRIVILEGES) Main PID: 24283 (code=exited, status=227/NO_NEW_PRIVILEGES) Dec 15 15:00:17 Serverdatorn-Debian systemd: redis-server.service: Unit entered failed state. Dec 15 15:00:17 Serverdatorn-Debian systemd: redis-server.service: Failed with result 'exit-code'. dpkg: error processing package redis-server (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: redis-server Starting redis-server by running the executable manually works perfectly: $ sudo /usr/bin/redis-server /etc/redis/redis.conf $ sudo tail /var/log/redis/redis-server.log ... * The server is now ready to accept connections on port 6379 If there is any other information you want me to provide, please tell me. EDIT: ------ I tried setting NoNewPrivileges to both yes and no in the redis.service file, reloading and starting it again, but no luck, same error. I did find that running journalctl -xe showed another message that might be helpful: redis-server.service: Failed at step NO_NEW_PRIVILEGES spawning /usr/bin/redis-server: Invalid argument